Add sulphuric acid to the mixture. Copper(II) oxide, a black solid and dilute sulfuric acid react to produce copper(II) sulfate, yielding a characteristic blue colour to the solution.Copper does not react with dilute sulphuric acid as its reduction potential is higher than that of hydrogen and therefore, does not displace hydrogen from dilute H2SO4.Filter the mixture to obtain copper turning as the residue and copper ii sulphate as the filtrate.Wash the residue to obtain pure copper and dry it between filter papers.
Mr Masinde answered the question on May 5, 2018 at 08:08
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A solution of tetrachloromethane burns colourless when propene gas is bubbled through it . What type of reaction takes place?
(Solved)
A solution of tetrachloromethane burns colourless when propene gas is bubbled through it. What type of reaction takes place?
Date posted:
May 1, 2018
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Answers (1)
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What is meant by the following as used in chemistry. (i) Solubility (ii) Saturated solution
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Date posted:
April 30, 2018
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Suggest a reason why BaSO4(a pigment made from sulphuric acid) would be
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Date posted:
April 29, 2018
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What are the properties of alpha radiation?
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April 26, 2018
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What is an Isotope?
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April 24, 2018
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Why are anesthetics useful in medicine?
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April 24, 2018
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Nitric v acid is manufactured by catalytic oxidation of ammonia gas (a) Name two raw materials other than ammonia that are used to manufacture the acid.....
(Solved)
Nitric v acid is manufactured by catalytic oxidation of ammonia gas
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b. Name the catalyst used.
c. Write an equation for reaction between nitric v acid and ammonia gas
d. sate one use of product in c
Date posted:
April 24, 2018
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Answers (1)
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A mixture contains iron(III)chloride, zinc(II)oxide and potassium chloride. Describe how each of the substance can be obtained from the mixture
(Solved)
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Date posted:
April 23, 2018
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(Solved)
A sample of calcium chloride is contaminated with anhydrous aluminum chloride. Explain how a sample of calcium chloride can be obtained from the mixture
Date posted:
April 23, 2018
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Answers (1)
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Substance Q has a melting point of 15°C and boiling point of 70°c.
(a)On the same axis,draw the melting point and boiling point graph for Q...
(Solved)
Substance Q has a melting point of 15°C and boiling point of 70°c.
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Date posted:
April 22, 2018
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Answers (1)
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(Solved)
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Date posted:
April 22, 2018
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Answers (1)
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(Solved)
Explain why ammonium trioxocarbonate (iv) leaves no residue when heated
Date posted:
April 22, 2018
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Answers (1)
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Write chemical equation for reaction between dry hydrogen gas and heated lead (ii) oxide
(Solved)
Write chemical equation for reaction between dry hydrogen gas and heated lead (ii) oxide.
Date posted:
April 21, 2018
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Answers (1)
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(i) What is rusting?
(ii) Give the chemical name of rust.
(Solved)
(i) What is rusting?
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Date posted:
April 21, 2018
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(Solved)
Explain the term fractional crystallization.
Date posted:
April 21, 2018
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Describe the process of extraction of Aluminium by electrolysis.
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April 20, 2018
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(Solved)
State uses of radio isotopes in the following:
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April 19, 2018
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Answers (1)
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Given the following reagents describe how to prepare lead (ii) sulphate, Solid potassium sulphate, solid lead (ii) carbonate, dilute nitric (iv) acid and distilled water.
(Solved)
Given the following reagents describe how to prepare lead (ii) sulphate: Solid potassium sulphate, solid lead (ii) carbonate, dilute nitric (iv) acid and distilled water.
Date posted:
April 19, 2018
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Answers (1)
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(Solved)
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Date posted:
April 19, 2018
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A crystal of copper (II) sulphate was placed in a beaker of water. The beaker was left standing for two days without shaking. State and...
(Solved)
A crystal of copper (II) sulphate was placed in a beaker of water. The beaker was left standing for two days without shaking. State and explain the observations that were made.
Date posted:
April 17, 2018
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Answers (1)